一种抽头式交指带通滤波器的设计及实现  

Design of Microstrip Tapped-Input Interdigital Bandpass Filters

作　　者：彭卫东[1] 周超[1] 张熙[1] 

机构地区：[1]中国民用航空飞行学院航空工程学院,四川广汉618307

出　　处：《微电子学与计算机》2012年第5期197-200,共4页Microelectronics & Computer

基　　金：中国民用航空飞行学院自然基金项目(J2007-23)

摘　　要：传统的交指带通滤波器设计采用公式计算归一化自电容和互电容,并通过查表计算得到滤波器的参数,该方法计算繁琐,且计算误差较大.文中介绍了一种根据谐振器的直接耦合原理,利用两终端的外部品质因数Q和谐振器间的耦合系数K设计抽头式交指型带通滤波器的方法.据此,设计了一种用于微波选频的交指滤波器,借助ADS软件对滤波器进行仿真和优化.通过仿真及实测结果的分析对比,进一步给出了设计改进方案.The traditional method to design interdigital filter, which obtains the filter parameters from calculating self-capacitance, mutual capacitance and Look-up table, proved to be complicated and inaccurate. In this paper, a new method utilizing external quality factor Q and the inter-resonator coupling coefficient K was introduced. As a sequent, an interdigital filter was designed for the microwave frequency-selector. The simulation results were compared with the experimental results. Further, the modulated method for bandpass filter was presented in detail.

关 键 词：交指滤波器 耦合系数 外部品质因数 抽头式 

分 类 号：TM930.2[电气工程—电力电子与电力传动]